Borehole temperature estimation based on various data acquired at IODP 337

Author(s): Yamada, Yasuhiro; Sanada, Yoshinori; Moe, Kyaw; Kubo, Yusuke; Inagaki, Fumio
Author Affiliation(s): Primary:
Japan Agency for Marine-Earth Science and Technology, Kanagawa, Japan
Volume Title: AGU 2015 fall meeting
Source: American Geophysical Union Fall Meeting, Vol.2015; American Geophysical Union 2015 fall meeting, San Francisco, CA, Dec. 14-18, 2015. Publisher: American Geophysical Union, Washington, DC, United States
Note: In English
Summary: Precise estimation of underground temperature by using drill holes is a challenging issue, since drilling operation disturbs the original underground temperature. A common procedure to estimate the undisturbed in-situ temperature in a borehole is to use the 'build-up' method, based on the measured values and their measured time after circulation of drill fluid, to estimate the equilibrium temperature. We acquired several datasets of borehole temperature at an IODP well, off northern Japan, and found that the temperature gradient is almost perfectly linear and the local undulations observed at the well were due to the thermal conductivity of the surrounding rocks.
Year of Publication: 2015
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 07 Marine Geology and Oceanography; Cores; Expedition 337; Integrated Ocean Drilling Program; Marine sediments; North Pacific; Northwest Pacific; Pacific Ocean; Sediments; Temperature; West Pacific
Coordinates: N411035 N411036 E1421202 E1421201
Record ID: 2016093667
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States